I found this photo of a man and woman in a Lemon Grove, CA Antique Thrift Store. I am unsure of the relationship of the couple. She is wearing a wedding ring and he is not. Notice the flower in his lapel. I had the first impression that this was a couple newly married, but I am unsure as her dress is not very formal. It is possible however that this is her wedding dress.
The names of the people are not listed on the back, however "Sonora, CA, 1889" is written.
On the boarder of the cabinet photo the inscription, "Harrington, Sonora, Cal. is stamped" There is no immediate information online as to the Harrington Photography Studio in Sonora, Cal. Maybe some online databases or indexes will have some information.